(s_(NN))^(1/2)=200GeV/核子重离子碰撞中J/ψ粒子的产生与核遮蔽效应  

Nuclear Effect of Shadowing and J/ψ Production in Heavy Ion Collisions at a Center of Mass Energy of (s_(NN))^(1/2)=200 GeV/nucleon

作　　者：刘植凤[1] 段春贵[2] 

机构地区：[1]石家庄经济学院地球动力研究所,河北石家庄050031 [2]河北师范大学物理科学与信息工程学院,河北石家庄050016

出　　处：《河北师范大学学报（自然科学版）》2007年第5期622-625,共4页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金(10575028)

摘　　要：在RHIC的PHENIX的快度接收范围内,采用EKS98和HKN04给出的束缚核子部分子分布函数,计算了(s_(NN))^(1/2)=200 GeV/核子p-Au,p-p碰撞中色八重态产生机制下J/ψ粒子微分截面随快度的变化.在RHIC能量下,最主要的粲夸克偶素产生过程是胶子融合.所得结论与实验数据对比,有助于了解胶子分布的核遮蔽效应.In order to study the nuclear shadowing effect of gluon distribution function, using the color Octet mechanism and two different shadowing effect factors, the production cross section of √sNN=200GeV/nuclon in p-p and p-Au collisions with respect to the rapidity distribution within the PHENIX detector acceptance range is calculated. Because under the RHIC energy, the dominant charmonium production process is gluon fusion process, comparing our result with the future experiment data of PHENIX the gluon distribution function in nuclear can be known better.

关 键 词：色八重态模型 核效应 粲夸克偶素 部分子分布函数 

分 类 号：O571.21[理学—粒子物理与原子核物理]